05-08-2017, 01:24 PM
There are lots of power supply calculators available online. Pull one of them up, enter the specs of the computer hardware you are running, and it will calculate for you. You can even specify how many case fans, how many hdds, etc you are running on the ones I have used. If you are interested in adding another 1080FE, up the quantity to two, and recalculate. It'll tell you if your 750 is good enough.
Also, I don't know how *nix handles mixing of AMD/NVIDIA GPUs, but on windows I have never had good luck mixing the two. If you already have the 1080FE, you could always look at getting a 1070FE, 1060FE, 1050Ti, or 1050FE to go with it and save a few bucks, and since they use the same drivers, you don't have to worry about conflicts. You could also look around on ebay or similar for used GTX10 series cards or even GTX9 reference design cards. If you go with 9 series cards, make sure to go for the 970/980/980Ti/TitanX cards with the Maxwell architecture. As mentioned earlier, go for the reference design cards with the single fan that blows the exhaust out the back. The OEM design cards with the massive fans just cook each other.
Also, I don't know how *nix handles mixing of AMD/NVIDIA GPUs, but on windows I have never had good luck mixing the two. If you already have the 1080FE, you could always look at getting a 1070FE, 1060FE, 1050Ti, or 1050FE to go with it and save a few bucks, and since they use the same drivers, you don't have to worry about conflicts. You could also look around on ebay or similar for used GTX10 series cards or even GTX9 reference design cards. If you go with 9 series cards, make sure to go for the 970/980/980Ti/TitanX cards with the Maxwell architecture. As mentioned earlier, go for the reference design cards with the single fan that blows the exhaust out the back. The OEM design cards with the massive fans just cook each other.